I didn't restart immediately after updates cause i was on youtube.. but i left the computer to do something for like 5 mins and when i came back, I found my desktop completely black with a message saying "my screen locker got broken".
I restarted my computer and noticed my audio was out and both full and force full composition pipeline were unchecked for some reason.
After i checked both of them solved the jittering I was experiencing. I also unplugged and plugged my headphones back which fixed my audio issue. Idk why this happened and don't know how to reproduce the effect again but just want to let you know in hopes it can help others.
Other than that.. everything is back to normal with this amazing OS. I'm on Plasma btw.